Gearbox problem again!!!!!!

Subject: Gearbox problem again!!!!!! Fri Dec 28, 2007 11:30 am

Hi everyone. Merry Chrimbo - hope you all had a good one! santa

We did, but now the gearbox is playing up again!!! Embarassed

Any advice welcome...

We have an LT77 (55G) gearbox in our Disco. In 1st gear whilst pulling away quickly, e.g. at a roundabout or junction, when the clutch is about half way up, suddenly there is no drive and a grinding noise Embarassed

Once going it's fine. We replaced the clutch in September (3 piece kit) before the Rally and actually fitted this secondhand gearbox in October, as the original box (LT77 55H) was doing a similar thing when under load, e.g. towing in low range and pulling away Rolling Eyes

Do you think it's a problem with the main transmission? :?:

Also, does anybody know... If we were to upgrade to an R380 later gearbox, would this go straight in or would we need to modify the bell housing, transfer box etc?

Help!!

Lu :bom:

Number of posts : 549 Registration date : 2007-03-27

Sorry to hear about the box, Lu!

Can't offer any advice, only best of luck getting it fixed!

Subject: Re: Gearbox problem again!!!!!! Sat Dec 29, 2007 3:29 am

Hiya Lu.
I took the liberty of posting your Question on my forum and here is a reply from my mechanic chappy.
Hope that it helps you a wee bitty.

Could be the mainshaft has worn where it enters the transfer-box.
(remove round plate at rear of transfer box to inspect splines)

Or

Somebody has fitted the clutch plate the wrong way around and it's touching the flywheel bolts....

wills

Subject: Re: Gearbox problem again!!!!!! Sat Dec 29, 2007 3:36 am

Cheers Mark and Bofa.

We'll continue to investigate! Currently reading the huge Disco workshop manual! study

What a way to spend New Year weekend!

Lu and T :bom:

Guest

hi L & T

what oil did you put in the gear box?

cheers kieran

Subject: Re: Gearbox problem again!!!!!! Sat Dec 29, 2007 10:56 am

ATF as recommended by the book even though it's a manual gearbox. I know Difflock do some super duper oil though - perhaps it's worth a go. has anybody tried it? :?:

Lu :bom:

Guest

its all good then just making sure you havnt used EP 90 like some wally did
( me )

i just use the cheapest the shop sells Laughing

good luck sorting it, if your struggling to find anything i will ask on some other forums i some times use

cheers kieran santa

Organiser Number of posts : 3925 Registration date : 2007-01-29

How about trying the Discovery Owners Club - wealth of experience and all that?

Number of posts : 549 Registration date : 2007-03-27

GO ON THEN! I'll ask the question?

Why ATF, instead of EP90?

cheers

Organiser Number of posts : 3925 Registration date : 2007-01-29

I believe I heard somewhere in the dim and distant past, that EP90 eats into the rubber/polypropelyne/or whatever they are made from - of the oil seals. Am I right?

Come back and answer the question Jon (of Venture Overland) - all is forgiven! Smile

Guest

it was on landy rally in switzerland when the transfer box ran out of oil and we didnt know what to do because we forgot to pack the all important EP 90 for the transfer box, many many many many many lots of thanks to Tom and Bager for saving us THANKYOU!!!!

anyway we put the EP 90 tom had managed to get for us into the gear box not knowing it was the gear box we filled up with an extra 2 litres + EP 90
my dad managed to get the right filler plug undone the next morning and we thought all was well,

it was only a couple of weeks after we got back that in the cold weather i found that changing down from second to first no matter how hard i pressed the cluthc wouldnt go, all of the gear changes were becoming more unsmooth so i asked around and realised what we had done and changed it to auto transmission fluid and it all runs smooth again
cheers

cheers kieran

happy new year

Number of posts : 549 Registration date : 2007-03-27

Arh! Sounds plausible! Thank you. Another advancement in technology? Smile

Does that also apply to the R380 boxes? Just out of interest.

Glad you got it sorted now Kieran.

cheers

Mark

Subject: Re: Gearbox problem again!!!!!! Fri Jan 04, 2008 3:03 pm

CarpeDiem wrote:: GO ON THEN! I'll ask the question?

Why ATF, instead of EP90?

Because that's what it says in the book was our reason!! study

We've sought advice from many avenues (including the Discovery Owners Club - cheers Tom) and we now think it may be the clutch - we don't have much luck with clutches! Mad

(Remember Andorra Pukka Posse?!?!)

Lu :bom:

Organiser Number of posts : 3925 Registration date : 2007-01-29

Still looking for the clutch in my Rangie! Laughing

Number of posts : 549 Registration date : 2007-03-27

"Remember Andorra Pukka Posse"

Seems so long ago, hope you get it sorted, best of luck!

Subject: Re: Gearbox problem again!!!!!! Mon Jan 07, 2008 3:55 am

Im not a great lot of help here Im affraid... Although Tom is right about the difference in ATF / EP90.

As for the gearbox / clutch - Id give Dave a call at Ashcrofts and pick his brains - nice chap and very helpful.

Subject: Re: Gearbox problem again!!!!!! Mon Jan 07, 2008 5:46 pm

Yes, he's been great, we've been emailing him.

Lu :bom:

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